摘要
基于频率源噪声特性和幂率谱密度之间的关系,构建了一种通过频率源目标稳定度反向生成虚拟钟差序列模型,利用虚拟钟差序列模型可以快速、高效地生成目标频率源的长期钟差数据。针对不同类型频率源的组合噪声特征,采用传统的噪声模型生成5种频率源噪声,然后利用仿真分析验证虚拟钟差序列生成模型的正确性。通过比对仿真结果可知,基于铷钟、氢钟和铯钟的虚拟钟差序列的稳定度与实测钟差序列的稳定度基本相符,重建虚拟钟差序列能够准确地反映其频率噪声特性,因此,文中采用频率源目标稳定度生成其钟差序列的方法可行、有效。
Based on the relationship between the noise characteristics of the frequency source and the power-law spectral densities,a virtual clock error sequence model for reverse generation by the target stability of the frequency source is constructed,then the long-term clock difference data of the target frequency source can be generated quickly and efficiently by the virtual clock difference sequence model.According to the combined noise characteristics of different types of frequency sources,the traditional noise model is used to generate five kinds of frequency source noise,and then the simulation analysis is used to verify the correctness of the generation model of the virtual clock error sequence.By comparing the simulation results,it can be seen that the stability of the virtual clock error sequence based on rubidium clock,hydrogen clock and cesium clock is basically consistent with the stability of the measured clock error sequence,and the reconstruction of the virtual clock error sequence can scientifically and accurately reflect its frequency noise characteristics,therefore,the method of generating clock difference sequence using the stability of the target frequency source is feasible and effective.
作者
秦晓伟
杜二旺
赵春勃
王国永
杨涛
QIN Xiaowei;DU Erwang;ZHAO Chunbo;WANG Guoyong;YANG Tao(China Academy of Space Technology(Xi’an),Xi’an 710000,China)
出处
《空间电子技术》
2023年第4期66-71,共6页
Space Electronic Technology
关键词
频率源
噪声
钟差
频率稳定度
frequency source
clock noise
clock difference
frequency stability
